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Visceral pain

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https://www.readbyqxmd.com/read/28635651/effects-of-tetrodotoxin-in-mouse-models-of-visceral-pain
#1
Rafael González-Cano, Miguel Ángel Tejada, Antonia Artacho-Cordón, Francisco Rafael Nieto, José Manuel Entrena, John N Wood, Cruz Miguel Cendán
Visceral pain is very common and represents a major unmet clinical need for which current pharmacological treatments are often insufficient. Tetrodotoxin (TTX) is a potent neurotoxin that exerts analgesic actions in both humans and rodents under different somatic pain conditions, but its effect has been unexplored in visceral pain. Therefore, we tested the effects of systemic TTX in viscero-specific mouse models of chemical stimulation of the colon (intracolonic instillation of capsaicin and mustard oil) and intraperitoneal cyclophosphamide-induced cystitis...
June 21, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28634431/the-aftermath-of-a-hepatic-artery-aneurysm-a-rare-etiology-of-biliary-obstruction
#2
Catherine Linzay, Abhishek Seth, Kunal Suryawala, Ankur Sheth, Moheb Boktor, John Bienvenu, Robby Rahim, Guillermo P Sangster, Paul A Jordan
BACKGROUND: Hepatic artery aneurysms (HAAs) constitute 14% to 20% of visceral artery aneurysms. Most HAAs are asymptomatic. Although rare, obstructive jaundice due to external bile duct compression or rupture of the HAA into the biliary tree with occlusion of the lumen from blood clots has been reported. CASE PRESENTATION: A 56-year-old white man presented to an outside hospital with symptoms of obstructive jaundice, including abdominal pain and yellowing of the skin...
2017: Clinical Medicine Insights. Gastroenterology
https://www.readbyqxmd.com/read/28631554/the-effects-of-platelet-activating-factor-on-uterine-contractility-perfusion-hypoxia-and-pain-in-mice
#3
Kevin M Hellman, Peter Y Yu, Folabomi A Oladosu, Chaya Segel, Alice Han, Pottumarthi V Prasad, Tamas Jilling, Frank F Tu
It is widely hypothesized that menstrual pain is triggered by prostaglandin synthesis that evokes high-pressure uterine contractions and ischemia. However, the effects of molecules implicated in menstrual pain on uterine contractility, perfusion, and oxygenation in vivo have been rarely demonstrated. Studies in women that do not respond to nonsteroidal anti-inflammatory drugs (NSAIDs) have reported elevated levels of platelet-activating factor (PAF). To establish in vivo evidence of PAF's capability to impair uterine homeostasis and to elicit visceral pain, we examined the effects of the PAF receptor agonist (carbamyl PAF [CPAF]) in comparison to other molecules hypothesized to play a role in uterine pain in mice...
January 1, 2017: Reproductive Sciences
https://www.readbyqxmd.com/read/28629511/microbiota-regulates-visceral-pain-in-the-mouse
#4
Pauline Luczynski, Monica Tramullas, Maria Viola, Fergus Shanahan, Gerard Clarke, Siobhain O'Mahony, Timothy G Dinan, John F Cryan
The perception of visceral pain is a complex process involving the spinal cord and higher order brain structures. Increasing evidence implicates the gut microbiota as a key regulator of brain and behavior, yet it remains to be determined if gut bacteria play a role in visceral sensitivity. We used germ-free mice (GF) to assess visceral sensitivity, spinal cord gene expression and pain-related brain structures. GF mice displayed visceral hypersensitivity accompanied by increases in Toll-like receptor and cytokine gene expression in the spinal cord, which were normalized by postnatal colonization with microbiota from conventionally colonized (CC)...
June 20, 2017: ELife
https://www.readbyqxmd.com/read/28611665/toll-like-receptor-4-in-paraventricular-nucleus-mediates-visceral-hypersensitivity-induced-by-maternal-separation
#5
Hui-Li Tang, Gongliang Zhang, Ning-Ning Ji, Lei Du, Bin-Bin Chen, Rong Hua, Yong-Mei Zhang
Neonatal maternal separation (MS) is a major early life stress that increases the risk of emotional disorders, visceral pain perception and other brain dysfunction. Elevation of toll-like receptor 4 (TLR4) signaling in the paraventricular nucleus (PVN) precipitates early life colorectal distension (CRD)-induced visceral hypersensitivity and pain in adulthood. The present study aimed to investigate the role of TLR4 signaling in the pathogenesis of postnatal MS-induced visceral hypersensitivity and pain during adulthood...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28605527/effect-of-transcranial-direct-current-stimulation-of-the-motor-cortex-on-visceral-pain-in-patients-with-hepatocellular-carcinoma
#6
Nagwa Mostafa Ibrahim, Khaled Mohamed Abdelhameed, Shereen Mamdouh Mohamed Kamal, Eman Mohamed Hussein Khedr, Hassan Ibrahim Mohamed Kotb
Objective. : Hepatocellular carcinoma (HCC) is frequently associated with visceral pain. Transcranial direct current stimulation (tDCS) has been proven to reduce chronic pain; however, its effectiveness in malignant visceral pain is unknown. This study aimed to investigate the effects of tDCS in patients with visceral pain due to HCC. Design. : This is a randomized, sham-controlled, double-blind, prospective study. Forty patients with visceral pain due to HCC were enrolled and randomly assigned into two groups: a real and a sham group; tDCS was applied over the primary motor area (M1) for 10 consecutive days (2 mA, 30 minutes)...
June 12, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/28587873/regulation-of-transient-receptor-potential-cation-channel-subfamily-v1-protein-synthesis-by-the-phosphoinositide-3-kinase-akt-pathway-in-colonic-hypersensitivity
#7
Shanwei Shen, Hamad W Al-Thumairy, Fiza Hashmi, Li-Ya Qiao
The transient receptor potential cation channel subfamily V member 1 (TRPV1), also known as the capsaicin receptor or vanilloid receptor 1 (VR1), is expressed in nociceptive neurons in the dorsal root ganglia (DRG) and participates in the transmission of pain. The present study investigated the underlying molecular mechanisms by which TRPV1 was regulated by nerve growth factor (NGF) signaling pathways in colonic hypersensitivity in response to colitis. We found that during colitis TRPV1 protein levels were significantly increased in specifically labeled colonic afferent neurons in both L1 and S1 DRGs...
June 3, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28581681/anti-vegf-treatment-decreases-bladder-pain-in-cyclophosphamide-cystitis-a-mapp-research-network-animal-model-study
#8
H Henry Lai, Baixin Shen, Pooja Vijairania, Zhang Xiaowei, Sherri K Vogt, Robert W Gereau
OBJECTIVE: To investigate whether treatment with anti-VEGF (vascular endothelial growth factor) neutralizing antibodies can reduce pain and voiding dysfunction in the cyclophosphamide (CYP) cystitis model of bladder pain in mice. MATERIALS AND METHODS: Adult female mice received anti-VEGF neutralizing antibodies (10 mg/kg intraperitoneal B20-4.1.1 VEGF mAb) or saline (control) pre-treatment, followed by CYP (150 mg/kg intraperitoneal) to induce acute cystitis. Pelvic nociceptive responses were assessed by applying von Frey filaments to the pelvic area...
June 5, 2017: BJU International
https://www.readbyqxmd.com/read/28578716/univariate-and-multivariate-models-for-the-prediction-of-life-threatening-complications-in-586-cases-of-deep-neck-space-infections-retrospective-multi-institutional-study
#9
J Mejzlik, P Celakovsky, L Tucek, M Kotulek, A Vrbacky, P Matousek, L Stanikova, T Hoskova, A Pazs, P Mittu, V Chrobok
OBJECTIVE: To identify deep neck infection factors related to life-threatening complications. METHODS: This retrospective multi-institutional study comprised 586 patients treated for deep neck infections between 2002 and 2012. The statistical significance of variables associated with life-threatening complications of deep neck infections was assessed. RESULTS: During treatment, life-threatening complications occurred in 60 out of 586 cases...
June 5, 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/28567348/chest-pain-caused-by-multiple-exostoses-of-the-ribs-a-case-report-and-a-review-of-literature
#10
Daniele Mazza, Mattia Fabbri, Cosma Calderaro, Carlo Iorio, Luca Labianca, Camilla Poggi, Francesco Turturro, Antonello Montanaro, Andrea Ferretti
The aim of this paper is to report an exceptional case of multiple internal exostoses of the ribs in a young patient affected by multiple hereditary exostoses (MHE) coming to our observation for chest pain as the only symptom of an intra-thoracic localization. A 16 years old patient with familiar history of MHE came to our observation complaining a left-sided chest pain. This pain had increased in the last months with no correlation to a traumatic event. The computed tomography (CT) scan revealed the presence of three exostoses located on the left third, fourth and sixth ribs, all protruding into the thoracic cavity, directly in contact with visceral pleura...
May 18, 2017: World Journal of Orthopedics
https://www.readbyqxmd.com/read/28566000/peripheral-kv7-channels-regulate-visceral-sensory-function-in-mouse-and-human-colon
#11
Madusha Peiris, James Rf Hockley, David E Reed, Ewan St John Smith, David C Bulmer, L Ashley Blackshaw
Background Chronic visceral pain is a defining symptom of many gastrointestinal disorders. The KV7 family (KV7.1-KV7.5) of voltage-gated potassium channels mediates the M current that regulates excitability in peripheral sensory nociceptors and central pain pathways. Here, we use a combination of immunohistochemistry, gut-nerve electrophysiological recordings in both mouse and human tissues, and single-cell qualitative real-time polymerase chain reaction of gut-projecting sensory neurons, to investigate the contribution of peripheral KV7 channels to visceral nociception...
January 2017: Molecular Pain
https://www.readbyqxmd.com/read/28557891/clinical-presentation-and-risk-factors-of-venous-thromboembolic-disease
#12
Sulaiman Alhassan, Anca Pelinescu, Viral Gandhi, Mouhib Naddour, Anil C Singh, Eric Bihler
Venous thromboembolism (VTE) has a wide range of clinical presentations. Deep venous thrombosis may occur in upper or lower extremities or in visceral veins. Extremity deep venous thrombosis usually manifests with unilateral painful swelling in the limb, while visceral deep venous thrombosis manifestations vary on the basis of the involved organ. Pulmonary embolism classically manifests with sudden pleuritic chest pain and unexplained dyspnea. Superficial thrombophlebitis usually presents with acute inflammation around a palpable thrombosed superficial vein...
July 2017: Critical Care Nursing Quarterly
https://www.readbyqxmd.com/read/28552056/the-orexinergic-hypocretin-system-and-nociception-an-update-to-supraspinal-mechanisms
#13
Ali Roohbakhsh, Mohaddeseh Sadat Alavi, Hassan Azhdari Zarmehri
Chronic pain is a multifaceted and complex condition that is divided into somatic, visceral, and neuropathic pain. Although opioids and nonsteroidal anti-inflammatory drugs cause analgesia and are effective in the treatment of chronic pain, their utility is hampered by side effects, abuse potential, and development of tolerance to their pain-relieving effects. So, finding alternative analgesics with good efficacy and low side effects is of great interest and the orexinergic system is a potential candidate. Orexin-A and -B are exclusively expressed in the lateral hypothalamus and are involved in the feeding, sleep/wake cycle, cardiovascular function, hormone secretion, seizure, and pain modulation...
May 28, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28533182/biased-visceral-perception-through-fear-learning-biased-intensity-judgements-of-visceral-sensations-after-learning-to-fear-visceral-stimuli-a-drift-diffusion-approach
#14
Jonas Zaman, Victoria J Madden, Julie Iven, Katja Wiech, Nathalie Weltens, Huynh Giao Ly, Johan W S Vlaeyen, Lukas Van Oudenhove, Ilse Van Diest
A growing body of research has identified fear of visceral sensations as a potential mechanism in the development and maintenance of visceral pain disorders. However, the extent to which such learned fear affects visceroception remains unclear. To address this question, we used a differential fear conditioning paradigm with non-painful esophageal balloon distensions of two different intensities as conditioning stimuli (CSs). The experiment comprised pre-acquisition, acquisition and post-acquisition phases during which participants categorized the CSs with respect to their intensity...
May 19, 2017: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/28531567/impact-of-body-composition-parameters-on-clinical-outcomes-in-patients-with-metastatic-castrate-resistant-prostate-cancer-treated-with-docetaxel
#15
Samantha J Cushen, Derek G Power, Kevin P Murphy, Ray McDermott, Brendan T Griffin, Marvin Lim, Louise Daly, Peter MacEneaney, Kathleen O' Sullivan, Carla M Prado, Aoife M Ryan
BACKGROUND: Body composition may influence clinical outcomes of certain chemotherapeutic agents. We examined the prognostic significance of skeletal muscle mass and adipose tissue on docetaxel toxicity and overall survival in patients with metastatic castrate resistant prostate cancer (mCRPC). METHODS: A retrospective review of patients medical records with mCRPC, treated with docetaxel was conducted. Body composition parameters (skeletal muscle mass, muscle attenuation [MA], visceral and subcutaneous adipose tissue) were measured at L3 by computed tomography (CT) and defined using previously established cut points...
June 2016: Clinical Nutrition ESPEN
https://www.readbyqxmd.com/read/28526575/percutaneous-electrical-nerve-field-stimulation-modulates-central-pain-pathways-and-attenuates-post-inflammatory-visceral-and-somatic-hyperalgesia-in-rats
#16
Reji Babygirija, Manu Sood, Pradeep Kannampalli, Jyoti N Sengupta, Adrian Miranda
A non-invasive, auricular percutaneous electrical nerve field stimulation (PENFS) has been suggested to modulate central pain pathways. We investigated the effects of BRIDGE® device on the responses of amygdala and lumbar spinal neurons and the development of post-colitis hyperalgesia. Male Sprague-Dawley rats received intracolonic trinitrobenzene sulfonic acid (TNBS) and PENFS on the same day. Control rats had sham devices. The visceromotor response (VMR) to colon distension and paw withdrawal threshold (PWT) was recorded after 7days...
May 17, 2017: Neuroscience
https://www.readbyqxmd.com/read/28526158/revisiting-oxycodone-analgesia-a-review-and-hypothesis
#17
REVIEW
Xiulu Ruan, Ken F Mancuso, Alan D Kaye
Oxycodone, a semisynthetic opioid analgesic, is widely used in clinical practice. Oxycodone and morphine seem to be equally effective and equipotent; however, morphine is 10 times more potent than oxycodone when given epidurally. This article provides an updated review of the basic pharmacology of oxycodone with a special focus on pharmacokinetic/pharmacodynamics properties. The controversy regarding oxycodone-mediated effects for visceral pain via agonism and the possible role of peripheral opioid analgesia are discussed in the present investigation in an attempt to propose a plausible explanation to the perplexing question of oxycodone analgesia...
June 2017: Anesthesiology Clinics
https://www.readbyqxmd.com/read/28521010/prospective-audit-of-a-pathway-for-in-patient-pain-management-of-chronic-abdominal-pain-a-novel-and-cost-effective-strategy
#18
Gopinath Niraj, Sanjay Chaudhri
Background.:  Unexplained abdominal pain is a common cause of hospital admission and utilizes significant resource. Current in-patient pain management of acute exacerbation of chronic abdominal pain is primarily directed at pharmacological and psychological management strategies in this group of complex patients. We adopted a novel approach that proved to be both clinically effective and cost-effective. Design.:  Adult patients admitted to a surgical ward with acute exacerbation of chronic abdominal pain referred to in-patient pain management were prospectively audited over a two-year period at a single tertiary centre...
May 17, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/28516238/foot-pain-severity-is-associated-with-the-ratio-of-visceral-to-subcutaneous-fat-mass-fat-mass-index-and-depression-in-women
#19
Tom P Walsh, John B Arnold, Tiffany K Gill, Angela M Evans, Alison Yaxley, Catherine L Hill, E Michael Shanahan
Body composition and poor mental health are risk factors for developing foot pain, but the role of different fat deposits and psychological features related to chronic pain are not well understood. The aim of this study was to investigate the association between body composition, psychological health and foot pain. Eighty-eight women participated in this study: 44 with chronic, disabling foot pain (mean age 55.3 SD 7.0 years, BMI 29.5 SD 6.7 kg/m(2)), and 44 age and BMI matched controls. Disabling foot pain was determined from the functional limitation domain of the Manchester Foot Pain and Disability Index...
May 17, 2017: Rheumatology International
https://www.readbyqxmd.com/read/28508867/bloating-and-abdominal-distension-old-misconceptions-and-current-knowledge
#20
REVIEW
Juan R Malagelada, Anna Accarino, Fernando Azpiroz
Bloating, as a symptom and abdominal distension, as a sign, are both common functional-type complaints and challenging to manage effectively. Individual patients may weight differently the impact of bloating and distension on their well-being. Complaints may range from chronic highly distressing pain to simply annoying and unfashionable protrusion of the abdomen. To avoid mishaps, organic bloating, and distension should always be considered first and appropriated assessed. Functional bloating and distension often present in association with other manifestations of irritable bowel syndrome or functional dyspepsia and in that context patients tend to regard them as most troublesome...
May 16, 2017: American Journal of Gastroenterology
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